Note also the price charts on the lower left. I'm headed for Lake Kalamalka, north of you. Price was WAY different when I booked the holiday. Last time I was there, the Marina was $0.16/liter more than street. Since you are not permitted to transport the gas to your boat, you'll have to drag the boat to town (Penticton), or at least haul it out of the water, or pay the piper.

Just hauling the boat there/back will run me $1000. Alternatively, would fetch a pretty decent set of tower speakers...